The study of the undiscovered mineral resources of the Tongass National Forest and adjacent lands,Southeastern Alaska     

David A. Brew  Lawrence J. Drew  Stephen D. Ludington 《Natural Resources Research》1992,1(4):303-322

The quantitative probabilistic assessment of the undiscovered mineral resources of the 17.1-million-acre Tongass National Forest (the largest in the United States) and its adjacent lands is a nonaggregated, mineral-resource-tract-oriented assessment designed for land-planning purposes. As such, it includes the renewed use of gross-in-place values (GIPV's) in dollars of the estimated amounts of metal contained in the undiscovered resources as a measure for land-use planning.Southeastern Alaska is geologically complex and contains a wide variety of known mineral deposits, some of which have produced important amounts of metals during the past 100 years. Regional geological, economic geological, geochemical, geophysical, and mineral exploration history information for the region was integrated to define 124 tracts likely to contain undiscovered mineral resources. Some tracts were judged to contain more than one type of mineral deposit. Each type of deposit may contain one or more metallic elements of economic interest. For tracts where information was sufficient, the minimum number of as-yet-undiscovered deposits of each type was estimated at probability levels of 0.95, 0.90, 0.50, 0.10, and 0.05.The undiscovered mineral resources of the individual tracts were estimated using the U.S. Geological Survey's MARK3 mineral-resource endowment simulator; those estimates were used to calculate GIPV's for the individual tracts. Those GIPV's were aggregated to estimate the value of the undiscovered mineral resources of southeastern Alaska. The aggregated GIPV of the estimates is $40.9 billion.Analysis of this study indicates that (1) there is only a crude positive correlation between the size of individual tracts and their mean GIPV's: and (2) the number of mineral-deposit types in a tract does not dominate the GIPV's of the tracts, but the inferred presence of synorogenic-synvolcanic nickel-copper, porphyry copper skarn-related, iron skarn, and porphyry copper-molybdenum deposits does. The influence of this study on the U.S. Forest Service planning process is yet to be determined.  相似文献   

陕西省矿泉水资源特征及开发对策     

肖平新 《陕西地质》1995,(2)

陕西省矿泉水资源丰富，开发条件优越，但发展速度较慢，存在着不少问题。针对全省矿泉水资源特点及开发中存在的问题，提出了矿泉水开发的具体对策。  相似文献   

Knowledge-Driven and Data-Driven Fuzzy Models for Predictive Mineral Potential Mapping   总被引：5，自引：0，他引：5  

Porwal  Alok  Carranza  E. J. M.  Hale  M. 《Natural Resources Research》2003,12(1):1-25

In this paper, we describe new fuzzy models for predictive mineral potential mapping: (1) a knowledge-driven fuzzy model that uses a logistic membership function for deriving fuzzy membership values of input evidential maps and (2) a data-driven model, which uses a piecewise linear function based on quantified spatial associations between a set of evidential evidence features and a set of known mineral deposits for deriving fuzzy membership values of input evidential maps. We also describe a graphical defuzzification procedure for the interpretation of output fuzzy favorability maps. The models are demonstrated for mapping base metal deposit potential in an area in the south-central part of the Aravalli metallogenic province in the state of Rajasthan, western India. The data-driven and knowledge-driven models described in this paper predict potentially mineralized zones, which occupy less than 10% of the study area and contain at least 83% of the model and validation base metal deposits. A cross-validation of the favorability map derived from using one of the models with the favorability map derived from using the other model indicates a remarkable similarity in their results. Both models therefore are useful for predicting favorable zones to guide further exploration work.  相似文献   

完善我国现行矿产资源法的理论分析     

廖欣 《矿产与地质》2006,20(3):304-308

文章对我国现行矿产资源法立法的历史继承性、时代特征、宪法依据等进行了理论分析,剖析了其立法上的有关局限性,尤其是在综合专家、学者观点的基础上,对矿业权之权利属性进行了一定的归纳分析,为完善我国现行矿产资源法的构想进行了理论上的探讨。  相似文献   

黑龙江省地质资料信息系统建设与应用   总被引：2，自引：0，他引：2  

徐文喜  张重光  文利杰  刘铁军 《国土资源信息化》2006,(3):7-10

黑龙江省地质资料信息系统建设与应用系统收集了1950年以来全省完成的各类地质成果资料和探矿权登记资料,数据库包括地质调查、矿产勘查、综合研究、矿产地成果等内容,入库地质项目4037个,矿产地793个,配置了1842幅矿产地成果图件,共17．8万个属性项。该地质资料信息系统具有数据管理、维护、查询、检索、输出等功能,在地质矿产行业中有广泛的用途。  相似文献   

矿产资源管理信息系统设计与开发   总被引：1，自引：0，他引：1  

沈泉飞  顾和和  张海荣  曹敏  钟立喜  房友东 《国土资源信息化》2006,(5):19-22

基于GIS的矿产资源管理信息系统采用地理信息系统(GIS)技术、SQL Server数据库技术以及网络技术,实现了矿产资源信息图形数据与属性数据统一管理,为矿产资源管理工作提供了现代化的科学管理手段和决策支持。本文介绍了系统的设计与实现、系统包含的工作模块、各个模块的功能结构以及采用的技术特点。  相似文献   

金矿的地质地球化学找矿标志     

薛水根 《江苏地质》2007,31(1):7-9

地层和岩浆岩含金高丰度是金矿赋集的物质来源,断裂构造是容矿、储矿的空间。一般说来,金成矿物质越丰富,就越有利于形成大矿、富矿。以江西金矿找矿为例,阐述正确圈定金异常,合理布置探矿工程,获得找金成果新突破的实际意义。  相似文献   

铅锌资源供需形势分析及市场前景预测   总被引：1，自引：0，他引：1  

吴荣庆  张燕如  张安宁 《江苏地质》2007,31(1):59-63

从资源保证程度、找矿前景、冶炼原料和金属产品的生产与需求、市场价格的变化趋势等几个方面,对铅锌资源的国内外市场的供需形势进行分析,并对其未来5年的市场前景进行了初步的预测。  相似文献   

基于多时相遥感的硫磺沟地区矿产资源开发及环境变化研究   总被引：1，自引：0，他引：1  

马骅吕永龙  周可法陈川 《岩石学报》2007,23(5):1181-1188

本文以天山硫磺沟矿区为示范研究区,在资料收集和野外调查分析基础上,利用1975年以来30年监测的遥感数据,提取研究区煤、铁、粘土等矿床开发区的时空分布和生态环境时空变化信息,结合数理统计方法和GIS空间分析技术,对矿区矿产开发与土地利用变化进行综合研究,分析硫磺沟矿区矿产开发引起的环境问题,建立1975年以来矿区开发与环境变化定量评价模型,绘制主要矿产分布、生态环境变化等专题图件,直观展现了矿产开发所引起的生态环境问题;探讨30年来矿产开发对自然和人文环境系统影响的过程和机制,确定不同类别矿产开发引起的环境变化和资源破坏的动态趋势,在此基础上提出相应的管理建议。  相似文献   

作为赋存于花岗岩中钨锡矿化勘探指南的流体包裹体异常——前景展望   总被引：1，自引：0，他引：1  

Andrew H Rankin 《岩石学报》2007,23(1):3-14

Studies of the distribution and abundance of fluid inclusions in granitic quartz associated with granite-hosted Sn-W mineralization of the British Isles reveal local and regional scale anomalies.At a sampling interval of c.5～50m,inclusion abundances increase towards zones of vein and stockwork mineralization exemplified by case history examples from exploration prospects in the Mourne Mountains of Northern Ireland and the Carrock Fell mining district of northwestern England.These steam aureoles provide a greater exploration target than the zone of visible alteration and mineralization and the lithogeochemical halo.But it is important to link them to geochemical data on fluid inclusion compositions,such as the semi-quantitative data from decrepitation-linked,ICP-AES (D-ICP)analysis,to optimize their exploration potential.Regional scale fluid inclusion anomalies,based on sampling intervals of c. 2km from the Sn-W mineralized granites of southwest England also broadly correlate with zones of intense mineralization in some areas. Regional-scale D-ICP analyses of quartz from SW England granites did not provide any convincing regional scale anomalies linked to mineralization except for positive boron anomalies around the centrally-mineralized Birch Tor area of the Dartmoor granite.Follow-up D-ICP analysis of quartz from stream sediments from this area,however,could be used to discriminate between samples related to mineralization from those draining unmineralized areas,using multivariate statistical analysis.At the present stage of development, the main contribution of fluid inclusion studies to mineral exploration is mostly limited to the conceptual stage where they continue to contribute to ore genetic theory and models.Costs and lack of knowledge transfer between research scientists and mineral explorationists limit their direct use during regional and target selection stages of exploration.Analysis of steam sediment quartz,using the more sensitive ICP-MS technique as a variant of the D-ICP method,appears to offer the greatest potential for future development as an exploration tool.  相似文献